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Radiant|Natural|GIA

1.51ct K SI1 Radiant Natural Diamond

GD • K/SI1 • GIA 5416106145

Certificate GIA 5416106145

Diamond specifications and retailer prices

From £4,365 GBP
As of November 6, 2026
Save £5,457 GBP (56%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £9,822 GBP at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.51ct natural radiant diamond

This 1.51ct natural radiant sits in the one-and-a-half to two carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 5416106145. Listed at 18 retailers as of November 5, 2026, with prices from £4,365 to £9,822, a £5,457 spread on the same certified stone. NZ Jewellers lists it at £9,822. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.51
Carat
K
Colour
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 5416106145
Dimensions7.37 × 5.79 × 3.95 mm
L/W Ratio1.27
Top View
7.37 mm5.79 mm1.51 ctK / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5416106145
Side View
Table 64.0%CrownGirdle: THN-THKPavilionCulet: NoneDepth 68.2%

Caratlytics Score

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B
Good
Decent quality, room for better deals
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £9,822 GBP|Low: £4,365 GBP|High: £9,822 GBP|Avg: £6,143 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 7, 2026
Retailer 10£4,365 GBP
Retailer 8£4,430 GBP
Retailer 3£4,911 GBP
Retailer 11£5,320 GBP
Retailer 9£5,402 GBP
Retailer 2£5,482 GBP
Retailer 4£5,694 GBP
Retailer 5£6,048 GBP
Retailer 6£7,165 GBP
Retailer 7£8,162 GBP
NZ Jewellers£9,822 GBP

45 data points across 11 retailers

18 retailers£4,365 GBP to £9,822 GBP

B
Cheapest Retailer
-
£4,365 GBP
Retailer 2
-
£4,430 GBP
View
Price last confirmed 10 days ago
B
Retailer 3
-
£4,548 GBP
View
B
Retailer 4
-
£4,640 GBP
View
B
Retailer 5
-
£4,704 GBP
View
Retailer 6
-
£4,911 GBP
View
Price last confirmed 9 days ago
B
Retailer 7
-
£4,923 GBP
View
B
Retailer 8
-
£4,952 GBP
View
B
Retailer 9
-
£5,320 GBP
View
B
Retailer 10
-
£5,402 GBP
View
B
Retailer 11
-
£5,482 GBP
View
C
Retailer 12
-
£5,614 GBP
View
C
Retailer 13
-
£5,694 GBP
View
B
Retailer 14
-
£6,048 GBP
View
C
Retailer 15
-
£6,139 GBP
View
C
Retailer 16
-
£7,165 GBP
View
C
Retailer 17
-
£8,162 GBP
View
Most Expensive
C
NZ Jewellers
3ad37f3d-6cfa-4792-824f-277fad820cb8 · Nov 5
£9,822 GBP
$13,147 USD
View
17 more retailers have this diamond
Prices start from £4,365 GBPSave up to £5,457 GBP

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

B
1.51ct Radiant
£4,365 GBP